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Given a string s, the objective is to locate and return longest substring that reads the same forwards and backwards. Examples Input: s = "babad" Output: "bab" Note: "aba" is also a valid answer. Input: s = "cbbd" Output: "bb" Input: s = "a" Output: "a" Input: s = "a ...

Exponential Calculation This solution calculates the power of 2 for a given non-negative integer n. Instead of iterating, we utilize bit shifting for efficiency. #include <iostream> int main() { std::ios::sync_with_stdio(false); std::cin.tie(nullptr); int exponent; std::cin >> exponent; long long resul ...

Combining Strings Using the "+" Operator The "+" operator allows concatenation of multiple strings. str1 = "aaa" str2 = "bbb" result = str1 + str2 print(result) # Output: aaabbb Note that direct concatenation with non-string types is not allowed: num = 100 str1 = "hello" # print(str1 + num) # ...

Java strings can accumulate trailing whitespace from sources such as user input or file I/O. This excess whitespace can lead to logical errors in programs or degrade user experience. The standard String.trim() method removes whitespace from both ends of a string. To specifically target trailing whitespace, alternative approaches are necessary. ...

Problem Description Design an algorithm to reformat license keys according to specific rules. A license key consists of alphanumeric characters and dashes (-). These dashes seperate the characters into groups. Given a required group size K, rearrange the key so that every group except possibly the first contains exactly K characters. The first ...

Python Strings Defining Strings In Python, strings can be defined using single quotes (' '), double quotes (" "), or triple quotes (''' ''' or """ """). Triple quotes enable multi-line string definitions. text_data = ' ' first_text = 'python' second_text = "best" third_text = ""&quo ...

Java stores strings internally using UTF-16 encoding, where String.length() returns the number of 16-bit code units. While most common CJK characters occupy a single code unit, their visual representaiton in monospaced terminals or grid interfaces typically spans two horizontal cells. Consequently, one Chinese character functions as the equival ...

Assignment Difficulty Overview First Assignment: 9 foundational Java problems covering conditional statements and loops, designed to build core programming skills for novices. Implementation is straightforward, focusing on aplpying basic language concepts. Second Assignment: 3 problems with a significant difficulty jump, emphasizing string pro ...

In Java development, retrieving the index of the second character in a string is a common task that involves basic string operations and index manipulation. This article demonstrates how to accomplish this using standard Java methods, with a focus on charAt() and indexOf(). To locate the second character, you first verify that the string contai ...

String Copy Function Implementations String manipulation is a fundamental skill in C programming. This article demonstrates several approaches to implementing string copying functions, from basic to optimized versions. Basic String Copy Implementation The following implementation demonstrates the core logic of copying characters from a source s ...